F01N 2900/1804
Properties of secondary air added directly to the exhaust
F01N2900/1804 (Properties of secondary air added directly to the exhaust) appears on 32 US grants and 35 published applications in this corpus.
Search patents in F01N- Granted patents
- 32
- Published applications
- 35
- Assignees
- 26
- Inventors
- 98
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 4 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 5 |
| 2018 | 1 | 0 |
| 2019 | 1 | 2 |
| 2020 | 1 | 5 |
| 2021 | 4 | 3 |
| 2022 | 5 | 4 |
| 2023 | 5 | 4 |
| 2024 | 6 | 2 |
| 2025 | 2 | 1 |
| 2026 | 1 | 1 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Exhaust purification device20 Jan 2026US 12,528,049 B2Mazda Motor Corporation
- Method and device for diagnosing an air supply of an internal combustion engine7 Oct 2025US 12,435,656 B2Robert Bosch GmbH
- Vehicle with gasoline particulate filter soot regeneration strategy with criteria emission reduction for low NOX emissions19 Aug 2025US 12,392,300 B1GM Global Technology Operations LLC
- Method and device for diagnosing coking in a secondary air system of an internal combustion engine15 Oct 2024US 12,116,914 B2Vitesco Technologies GmbH
- Method and system for managing an active selective catalyst reduction device of an after treatment system24 Sep 2024US 12,098,687 B2Fpt Motorenforschung AG
- Method and Device for Controlling a Secondary Air Mass Flow in a Secondary Air Supply of an Internal Combustion Engine12 Mar 2026US 2026/0071566 A1Robert Bosch GmbH
- Exhaust purification device28 Aug 2025US 2025/0269326 A1Mazda Motor Corporation
- Method and device for diagnosing an air supply of an internal combustion engine13 Jun 2024US 2024/0191646 A1Robert Bosch GmbH
- Flow estimation for secondary air system25 Jan 2024US 2024/0026809 A1Garrett Transportation I Inc.
- Method and system for managing an active scr device of an after treatment system ats23 Nov 2023US 2023/0374950 A1Fpt Motorenforschung AG
Most cited
By later US patents
- Vehicle having system and method of diagnosing secondary air injection apparatus12US 9,097,165 B2Hyundai Motor Company · 2015
- Selective catalytic reduction catalyst pre-heating and exhaust burner air control7US 11,506,136 B1Tenneco Automotive Operating Company Inc. · 2022
- Methods and systems for controlling air flow paths in an engine4US 9,957,876 B2Ford Global Technologies, LLC · 2018
- System and methods for mitigating hydrocarbon breakthrough2US 11,448,108 B1Ford Global Technologies, LLC · 2022
- Method for the diagnosis of an air supply circuit supplying air to a burner of an exhaust gas after-treatment system for an exhaust system of an internal combustion engine2US 11,898,482 B2Marelli Europe S.P.A. · 2024